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Submerged pump with spiral labyrinth seal device

A labyrinth seal and screw seal technology, applied in pump devices, components of pumping devices for elastic fluids, pumps, etc., can solve problems such as affecting submersible pumps and leaking liquids

Inactive Publication Date: 2010-12-29
JIANGSU GUOQUAN PUMP MFG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the reliability problem that the conveying medium in the pump body leaks into the sealed chamber and affect the normal operation of the submersible pump in the existing common submersible pump, the present invention provides a submersible pump with a spiral labyrinth sealing device. The submersible pump with spiral labyrinth sealing device can effectively prevent the conveying medium in the pump body from leaking into the sealing chamber, thereby solving the reliability problem that the normal operation of the submersible pump is affected by the leakage of liquid

Method used

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Embodiment Construction

[0008] Such as figure 1 As shown, the impeller 9 is fixed on the motor shaft 13 through the impeller nut 8, and a pump cover 10 is arranged above the impeller 9. The pump cover 10 is fixed with the pump body 7 through the connecting bolt 6. The pump cover 10 and the impeller 9 rear cover The first seal is formed between the seal rings at the plate to prevent the leakage of the conveying medium in the pump body 7. A right-handed spiral seal ring 11 is provided on the back of the impeller 9 close to the motor shaft 13, and a pass through impeller 9 is provided above the impeller 9. The connecting bolt 12 is fixed on the left-handed sealing ring 5 on the sealing chamber 4, and the right-handed sealing ring 11 and the left-handed sealing ring 5 form a labyrinth sealing device to form a second seal to prevent further leakage of the conveying medium in the pump body 7. The sealing chamber 4 is equipped with a mechanical seal 2 to form a third sealing device to ensure that the convey...

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Abstract

The invention provides a submerged pump with a spiral labyrinth seal device. A right-handed spiral sealing ring is arranged on the back of an impeller and close to a motor shaft; a left-handed spiral sealing ring fixed on a sealing chamber is arranged above the impeller; and the right-handed and left-handed spiral sealing rings form the labyrinth seal device. The submerged pump with the spiral labyrinth seal device can effectively prevent a liquid in the pump from leaking into the sealing chamber, so that the problem that the reliability of the normal running of the submerged pump is affected by the leak liquid is solved.

Description

technical field [0001] The invention relates to a submersible pump, in particular to a submersible pump which requires high sealing performance. Background technique [0002] The existing ordinary submersible pump has a sealed chamber between the motor and the impeller, and a mechanical seal is installed in the sealed chamber. The mechanical seal is used to prevent the conveying medium in the pump body from entering the sealed chamber. If the pressure in the chamber between the pumps is too high or the conveying medium containing solid particles is transported, the conveying medium in the pump body will leak into the sealed chamber soon, and the leaked conveying medium will further leak into the motor cavity, corrode the bearing and burn the motor , seriously affecting the reliability of submersible pump operation. Contents of the invention [0003] In order to overcome the reliability problem that the conveying medium in the pump body leaks into the sealed chamber and af...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D13/08F04D29/12
Inventor 朱荣生王秀礼杨爱玲
Owner JIANGSU GUOQUAN PUMP MFG CO LTD
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